<template>
  <div id="map"></div>
</template>

<script lang="ts" setup>
import { Map, View } from 'ol'
import { OSM } from 'ol/source'
import { Tile as TileLayer } from 'ol/layer'
import { onMounted, onBeforeUnmount } from 'vue'
import { ATTRIBUTIONS } from '../../constants'

let map: Map | null = null
onMounted(() => {
  map = new Map({
    //地图容器div的ID
    target: 'map',
    //地图容器中加载的图层
    layers: [
      //加载瓦片图层数据
      new TileLayer({
        //图层对应数据源，此为加载OpenStreetMap在线瓦片服务数据
        source: new OSM({
          attributions: ATTRIBUTIONS
        })
      })
    ],
    //地图视图设置
    view: new View({
      //地图初始中心点
      center: [0, 0],
      //地图初始显示级别
      zoom: 2
    })
  })
})

onBeforeUnmount(() => {
  if (map) {
    map.dispose()
    map = null
  }
})
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
#map {
  width: 100%;
  height: 100%;
}
</style>